<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>今天星期几</title>
	</head>
	<body>
		<h2 id="day"></h2>
		<script>
			//从Date对象返回一周中的某一天（0-6）
			var date=new Date().getDay();
			var h2=document.getElementById('day');
			var s="今天星期";
			switch(date){
				case 0:
				  s+="天";
				  break;
				case 1:
				  s+="一";
				  break;
				case 2:
				  s+="二";
				  break;
				case 3:
				  s+="三";
				  break;
				case 4:
				  s+="四";
				  break;  
				case 5:
				  s+="五";
				  break;
				case 6:
				  s+="六";
				  break;  
				default:
				  break;
			}
			
			h2.innerText=s;
			
		</script>
	</body>
</html>
